Is it possible to do this kind of load balancing in the cloud say for example in Digital Ocean if all of my droplets are from the same data center? Or do I need some sort of physical device to do this kind of layer 4 load balancing?
As it is shown here: http://blog.haproxy.com/2011/07/29/layer-4-load-balancing-direct-server-return-mode/
I like the idea that the load balancer just distributes and then the servers reply the request directly to the clients. Is this possible to do without physical hardware, but with software like haproxy?